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Finding the Fourth Proportional to 81,444.80, 122,167.20 and 61,761.80

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Solution

The fourth proportional to 81,444.80, 122,167.20 and 61,761.80 is: 92,642.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,444.80 : 122,167.20 = 61,761.80 : x
  2. Step 2: Convert to fraction form
    81,444.80/122,167.20 = 61,761.80/x
  3. Step 3: Cross multiply
    81,444.80x = 122,167.20 × 61,761.80
  4. Step 4: Simplify right side
    81,444.80x = 7,545,266,172.96
  5. Step 5: Solve for x
    x = 7,545,266,172.96/81,444.80
  6. Step 6: Final answer
    x = 92,642.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.